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Preliminary reduction of oxidized nickel ores | SpringerLink

Abstract. The laws of gas reduction of oxidized nickel ores (ONOs) are studied. The theoretical prerequisites of the selective reduction of ONO nickel, which are based on the difference between the oxygen partial pressures over the NiO-Ni and FeO-Fe systems, are discussed.

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The reduction of nickel from low-grade nickel laterite ore ...

In this study, the reduction of nickel from low-grade nickel laterite ore was performed using a solid-state deoxidisation method. Moreover, both gaseous and solid reductants were used, and the effects of the reduction temperature, reduction time, CO content, carbon content and CaO content on the nickel reduction process were examined.

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direct reduction of nickel ores in rotary kiln

nickel ore reduction grinding mill equipment. direct reduction of nickel ores in rotary kiln direct reduction of nickel ores in rotary kiln Rotary kilns for pre-reduction of nickel and manganese ores …

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nickel ore processing machines to ferronickel

raw ore and that during the reduction process were investigated by process mineralogy. Keywords: pre reduction; smelting; ferronickel alloy; nickel laterite ore. 1. ..... the amount of ore processed by the equipment, and aggravates soak erosion. Contact US

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Processing of Nickel Laterite Ores on the Rise

This paper describes the investigation of pre-treatment methods of a lateritic nickel ore. The pre-treatment and possible subsequent separation methods were examined with regard to the recovery of ...

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Non-isothermal kinetics study on carbothermic reduction of ...

The previous studies on reduction kinetics were mainly limited to pure nickel oxide and iron-nickel oxide, while few studies focused on reduction kinetics of nickel laterite ore. In this paper, the non-isothermal kinetics of reducing nickel laterite ore with graphite was investigated using a combination of thermogravimetry and mass spectrometer.

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REDUCTION OF A GARNIERITIC LATERITE ORE BY CO-CO2 …

A ferronickel alloy was formed by reduction of the metal oxides in the ore. The extent of reduction of nickel oxide ... Metallic iron formation is controlled so that nickel pre- ... Ore reduction was examined in isothermal experiments at temperatures between 700 and 900°C, in the CO-CO ...

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The effect of mineralogy, sulphur, and reducing gases on ...

The effect of mineralogy, sulphur, and reducing gases on the reducibility of saprolitic nickel ores Title: The effect of mineralogy, sulphur, and reducing gases on the reducibility of saprolitic nickel ores ... the higher the degree of the necessary pre-reduction of the calcine, the greater the energy saving during the smelting in the electric ...

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Mechanism of sodium chloride in promoting reduction of ...

Sodium chloride has been proved that it is an effective promoter for the reduction of high-magnesium, low-nickel oxide ore. The aim of current work is to clarify the promotion behavior of sodium ...

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nickel ore reduction process

[0016] The process of the present invention is a nickel laterite ore and the carbonaceous reducing molding (briquetting press or ball) of the shaped material is dried, preheated to remove crystal water, then pre-reduction, reduction and the depth grain growth nickel-iron alloy, nickel-iron and slag separation achieved by way of magnetic ...

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Nickel processing | Britannica.com

Nickel processing: Nickel processing, preparation of the metal for use in various products. ... As early as 200 bce the Chinese made substantial amounts of a white alloy from zinc and a copper-nickel ore found in Yunnan province ... One process is the ammonia pressure leach, in which nickel is recovered from solution using hydrogen reduction ...

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Reduction Smelting Low Ferronickel from Pre-concentrated ...

Abstract The research of smelting low ferronickel from pre-concentrate nickel-iron ore with 2.76 % Ni and 38.00 % Fe total was carried out to find an effective way for stainless steel enterprises to use the low-nickel laterite reasonable.

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pre reduction of nickel ores

Pre Reducing Process Kinetics to Recover Metals from . Limonite layer, the first layer of the nickel laterite ore and processed by high pressure acid leaching or atmospheric acid leaching using sulfuric acid, has 4050% of iron approximately, while nickel concentration is 0.81.5% and …

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Preliminary Reduction of Oxidized Nickel Ores

PRELIMINARY REDUCTION OF OXIDIZED NICKEL ORES 855 nickel and FeO from this mixture is not reduced to iron (i.e., iron is retained in the oxidized form). These prerequisites were tested experimentally. To perform experiments, we chose a temperature of 1000°C. The possibility of formation of a metallic phase from ONOs using mixtures of reducing ...

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Two-stage reduction for the preparation of ferronickel ...

cessing high-MgO nickel laterite ores, we used a pre-reduction smelting method to obtain ferronickel alloy from the nickel laterite ore from Tagaung Taung. Further-more, we investigated how the conditions of the pre-reduction–smelting method affect the process. 2. Experimental 2.1. Raw materials The Tagaung Taung nickel laterite ores (Ni content:

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Study of Nickeliferrous Laterite Reduction

Laterite is an important resource for the production of nickel. Pre-reduction of laterite is a critical step for all laterite based nickel production processes. The main kinds oflaterite, limonitic and serpentinic ore, behave differently upon reduction. Inthis study, general knowledge of laterites and nickel production were introduced. Research on

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CN101033515A

Laterite nickel ore smelting reduction preparation Inconel process, is first oxidized nickel laterite nickel ore is hematite pre-reduced into metallic nickel and iron metal or tri-iron tetroxide, while the gangue, and sulfur, phosphorus and other harmful elements into sulfate nonmagnetic phase or soluble, and then using a wet magnetic ...

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Nickel: smelting, producing-Metalpedia

Nickel is recovered through extractive metallurgy: it is extracted from its ores by conventional roasting and reduction processes that yield a metal of greater than 75% purity. In many stainless steel applications, 75% pure nickel can be used without further purification, depending on …

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Nickel

Nickel is obtained through extractive metallurgy: it is extracted from the ore by conventional roasting and reduction processes that yield a metal of greater than 75% purity. In many stainless steel applications, 75% pure nickel can be used without further purification, depending on the impurities.

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direct reduction rotary kiln nickel ore test

direct reduction of nickel ores in rotary kiln. Modelling and optimization of a rotary kiln direct reduction - SAIMM. Rotary kilns are used for a variety of mineral processing operations. nickel carbonate, nickel laterite, iron ore reduction, and spodumene (lithium) production.

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Thermodynamics of the Reduction Roasting of Nickeliferous ...

Limonite, Saprolite, Nickel, Thermodynamics, Reduction 1. Introduction Metallic nickel is primarily obtained from two ore types: nickel sulphide and nickeli-ferous laterite (oxide) ores. Global nickel resources averaging a minimum nickel grade of about 1% contain about 130 million tons of nickel, and the distribution between the

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Fluidized bed reduction of laterite fines with reducing ...

 · Pre-reduction is used in the pyrometallurgical treatment of nickel laterite ores to reduce the load placed on the nickel smelting furnace. This pre-reduction operation is for the specific purpose of removing oxygen present in the ore to yield a separate nickel enriched metal phase after smelting.

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Hydrogen to Replace Coking Coal in the Reduction of Iron ...

Commentary Hydrogen to Replace Coking Coal in the Reduction of Iron Ore in Steelmaking? Maybe One Day

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Reduction Smelting Low Ferronickel from Pre-concentrated ...

Read "Reduction Smelting Low Ferronickel from Pre-concentrated Nickel-Iron Ore of Nickel Laterite, High Temperature Materials and Processes" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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nickel ore processing machines to ferronickel

raw ore and that during the reduction process were investigated by process mineralogy. Keywords: pre reduction; smelting; ferronickel alloy; nickel laterite ore. 1. ..... the amount of ore processed by the equipment, and aggravates soak erosion. Contact US

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PILOT PLANT PRODUCTION OF FERRONICKEL FROM NICKEL …

PILOT PLANT PRODUCTION OF FERRONICKEL FROM NICKEL OXIDE ORES ... Reduction, Oxide ores, Introduction Nickel laterites and other nickel oxide ores constitute a very important part of world reserves of nickel. ... water in the hydroxide form. Dehydration as a minimum, and some pre-reduction of the ore in a rotary

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Mechanism of sodium chloride in promoting reduction of ...

The low nickel laterite ores, which nickel grade less than 1.5%, widely exists in the nature; consequently, the process of roasting reduction followed by magnetic separation has been proposed to ...

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ferronickel rotary kiln co reduction

direct reduction of lateritic nickel ores in rotary kiln - BINQ Mining. be used in the direct reduction of iron ores to produce a feed for steelmaking, in the … ferrochrome, and in the calcining and pre-reduction of nickel laterites for the production of ferronickel. … nology over other technologies, such as …

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Mechanism of sodium chloride in promoting reduction of ...

The low nickel laterite ores, which nickel grade less than 1.5%, widely exists in the nature; consequently, the process of roasting reduction followed by magnetic separation has been proposed to ...

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Effect of mineralogy and reducing agent on reduction of ...

Effect of mineralogy and reducing agent on reduction of saprolitic nickel ores A. Bunjaku*, M. Kekkonen, K. Pietila¨ and P. Taskinen The aim of this work was to explore the effect of mineralogy and gas reductant on the reduction of

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